Maximize button does not work with text-scaling-factor > 1

[sporteka2]

Environment

• Linux Mint 22.3 Zena
• Cinnamon 6.6.7 (Muffin)
• mintinstall 8.4.0
• Resolution: 1920x1080
• text-scaling-factor: 1.6

Issue

Clicking the maximize button in Software Manager has no effect — the window does not expand to full screen. This appears to be related to the same scaling issue as linuxmint/cinnamon#13835 and linuxmint/cinnamon#13836.

The window's default size is 800x685 (set in the glade file). With text-scaling-factor=1.6, the content width exceeds the screen's available area when maximized, causing Muffin to refuse or revert the maximize.

Steps to reproduce

1. Set gsettings set org.cinnamon.muffin text-scaling-factor 1.6
2. Open Software Manager
3. Click the maximize button
4. Window does not maximize

Expected

Maximize button should work regardless of text-scaling-factor.

Workaround

Lowering text-scaling-factor to 1.0 allows maximize to work:

gsettings set org.cinnamon.muffin text-scaling-factor 1.0

[sporteka2]

Correction: the workaround with lowering text-scaling-factor to 1.0 was not actually tested — please ignore that suggestion.

[sporteka2]

Same issue applies to window content fitting on screen with text-scaling-factor=1.6.

The window has default-width=800 and default-height=685 in its glade file. With text-scaling-factor=1.6, the effective minimum content size exceeds 1280×1096 CSS pixels — which barely fits on a 1920×1080 screen. Content at the bottom of the window is cut off even when the window is maximized.

This is the same class of issue as linuxmint/cinnamon#13835 (notification overlap) and linuxmint/cinnamon#13836 (calendar popup). All are caused by widget layouts using fixed pixel sizes that don't account for text-scaling-factor > 1.

Using relative/percentage sizes or setting a minimum window size proportional to the scaled content would fix this.